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Subject: AW: How to detect missing jars in a <path>?
Date: Mon, 12 Dec 2005 13:43:56 +0100
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Thread-Topic: How to detect missing jars in a <path>?
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From: <Jan.Materne@rzf.fin-nrw.de>
To: <user@ant.apache.org>
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I think enhancing <available> [1] would be good idea:

<available resource=3D"">
    <need compare=3D"min|max|exactly" number=3D"<integer>|all">
        <*resource/>
    </need>
</available>


<need> is a resource collection [2]. It combines multiple possibilities
* need exactly 3 of the specified resources
  <need compare=3D"exactly" number=3D"3">
* need 3 or more resources
  <need compare=3D"min" number=3D"3">
* need 4 or less resources
  <need compare=3D"max" number=3D"4">
* nedd all resources - which is the default
  <need compare=3D"exactly" number=3D"all">
  because it=B4s the default just: <need>=20


  <fail message=3D"Missing one resource">
     <available><need><path refid=3D"xyz"/></need></available>
  </fail>


Open:
- naming of the element (<need>)
- naming of the attributes
  Are here any other tasks where we can "reuse" the names?
- integration into resource collections
  Do I use the right scenario or is there something else?


Advantage: <available> would support resources (doesnt do it yet) :-)



Jan



[1] http://ant.apache.org/manual/CoreTasks/available.html
[2] =
http://svn.apache.org/repos/asf/ant/core/trunk/docs/manual/CoreTypes/reso=
urces.html#collection



>-----Urspr=FCngliche Nachricht-----
>Von: Bertrand Delacretaz [mailto:bdelacretaz@apache.org]=20
>Gesendet: Montag, 12. Dezember 2005 12:18
>An: Ant Users List
>Betreff: Re: How to detect missing jars in a <path>?
>
>Le 12 d=E9c. 05, =E0 11:57, Steve Loughran a =E9crit :
>
>> ...Sounds to me like you've just added a new condition to Ant,=20
>> Monsieur Delacretaz, called something like <pathexists> , which=20
>> verifies that every element in a path is present, logs at -verbose=20
>> level if one is missing (and perhaps sets a property to a=20
>> filelist/path of missing items)...
>
>Thanks for confirming that it doesn't exist yet, I was=20
>wondering if I was missing something obvious.
>
>> something like
>> <condition property=3D"missing.path">
>>   <available pathref=3D"xyz" missingpathid=3D"xyz.missing"=20
>> textproperty=3D"message" />
>> </condition>
>> <fail if=3D"missing.path">Missing files ${message}</fail>
>
>Sounds good, I'll try to come up with something in my Copious=20
>Free Time...
>
>Actually, if the JVMs would check existence of all jar files=20
>passed in the classpath, it would make our lives easier in many places.
>
>-Bertrand
>

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